Method for production of a component

ABSTRACT

On production of a component, two primary pieces must often be fixed together to give one piece. In order to achieve the above, it is important that the two primary pieces are oriented in a particular manner during the fixing process, which provides some difficulties. According to the invention, a plug body is fixed to the component by a mounting, whereby the position of the plug body relative to the component remains unchanged during a fixing process.

CROSS REFERENCE TO RELATED APPLICATION

This application is the US National Stage of International ApplicationNo. PCT/DE2003/003639, filed Nov. 3, 2003 and claims the benefitthereof. The International Application claims the benefits of GermanPatent application No. 10256414.0 DE filed Dec. 2, 2002, both of theapplications are incorporated by reference herein in their entirety.

FIELD OF THE INVENTION

The invention relates to a method for production of a componentaccording to the preamble of the claims.

BACKGROUND OF THE INVENTION

During the production of components, it is often necessary for stillfurther parts to be firmly connected to the component.

Such a method is disclosed, for example, by EP 868 253 B1. In thismethod, a filling element within a groove is firmly connected to thecomponent. However, the connection between the filling element and thecomponent in the groove is not sufficiently adequate, since the solderor the connecting layer between the filling element and the component isnot uniform or is incomplete.

SUMMARY OF THE INVENTION

The object of the invention is therefore to overcome this problem.

The object is achieved by a method as claimed in the claims.

Further advantageous measures are listed in the subclaims. The measureslisted in the subclaims can advantageously be combined with one another.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is explained in more detail in the following text by usingfigures, in which:

FIGS. 1, 2, 3 and 4 show a plurality of method steps of the methodaccording to the invention,

FIG. 5 shows a view of a component which is produced by the methodaccording to the invention, and

FIG. 6 shows a component after being finished by the method according tothe invention.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a component 1 in a first method step.

The component 1 has, for example, a groove 4. The component 1 is, forexample, a gas turbine component, such as a turbine blade. Followinguse, the turbine blade exhibits cracks, which are to be repaired. Such amethod is explained in more detail in EP 868 253 B1 and is intended tobe the disclosure of this application. In this method, the groove 4 isproduced as in FIG. 1, or there is an appropriate groove 4.

FIG. 2 shows the component 1 in a further method step of the methodaccording to the invention.

A filling element 7 is to be connected firmly to the component 1 on asurface 8 of the component 1 or in a groove 7 (FIG. 2).

A distance d of the filling element 7 from the base 5 in the groove 4can be zero or greater than zero.

In a gap 6 which is present between the filling element 7 and thecomponent 1 in the groove 4, for example at least one spacer 10 isarranged, for example in the vicinity of the surface 8 of the component1. In this way, a uniform gap can be achieved on both sides between thefilling element 7 and the component 1 in the groove 4.

FIG. 3 shows the component 1 in a further method step of the methodaccording to the invention.

In order to keep the filling element 7 in a fixed position during afixing method for fixing the filling element 7 to the component 1, useis made of a holder 13 which connects the filling element 4 to thecomponent 1 at least temporarily during a fixing method.

The holder 13 has at least one first holding point 22 on the surface 8of the component 1 and at least one second holding point 25 on thefilling element 7. The spacers 10 (FIG. 2) have been removed, forexample following the fitting of the holder 13, but can also remain inthe gap 6.

In particular, the holder 13 has the shape of a letter M. A first end ofthe M shape of the holder 13 constitutes the first holding point 22 onthe component 1. The second end of the M shape of the holder 13constitutes a third fixing point 28 on the component 1. In the middle ofthe M shape, the holder 13 is fixed to the filling element 7 at theholding point 25.

As a result of the M shape of the holder 13, an open cavity 19 isproduced under the limbs of the M shape. As a result, the gap 6 is alsofreely accessible under the holder 13.

In order to fix the filling element 7 to the component 1, various fixingmethods are available to choose. These are, for example, welding,lasering or electron beam welding and soldering methods.

FIG. 4 shows, by way of example, the procedure for a soldering method.

A solder material 16, for example in the form of solder paste or solderpowder, is applied, in particular in the vicinity of the gap 6. In asoldering process, the solder material 16 is melted and penetrates intothe gaps 6 and fills them completely. In addition, if there is adistance d between filling element 7 and base 5 which is different fromzero, a hollow volume between filling element 7 and base 5 can be filledwith the solder material.

FIG. 5 shows a view of a component 1 according to FIG. 3. The view showsthat two holders 13 are used in order to hold the filling element 7 inthe groove 4. However, only one or else more than two holders 13 canalso be used.

FIG. 6 shows a component 1 which has been produced by the methodaccording to the invention.

After a soldering operation, used by way of example, or after anotherfixing method, a connecting layer 16 or a solder layer 16 has beenproduced between the filling element 7 and the component 1, in the gap 6previously present. In this way, a fixed connection is produced betweenthe filling element 7 and the component 1. Excess solder material on thesurface 8 and the at least one holder 13 are removed in a last methodstep, for example by grinding.

If the filling element 7 is welded on in the groove 4, then, dependingon the welding method, only a partial connection can be produced betweenthe filling element 7 and the component 1, at the points where theholder 13 is not present. In this case, a connection, welded seam, isproduced at the accessible points. As a result, an adequately firmconnection is provisionally produced between filling element 7 and thecomponent 1. The at least one holder 13 can then be removed and thefreely accessible region of the gap 6, which was previously hidden underthe holder 13, can likewise be provided with a connecting layer 16 bymeans of welding or other connecting methods. The filling element 7 isthen connected completely to the component.

Such a method can be used when repairing cracks.

1-10. (canceled)
 11. A method for production of a component having asurface, comprising: connecting a filling element to the component by afixing method; during the fixing method of the filling element andcomponent, using a holder that connects the filling element to thecomponent at temporarily, wherein the holder has a first holding pointon a surface of the component and a second holding point on the fillingelement; and removing the holder after the filling element and componenthave been fixed.
 12. The method as claimed in claim 11, wherein thefilling element is introduced into a groove in the component, andbetween the filling element and the component in the groove there is agap in which a spacer is arranged.
 13. The method as claimed in claim12, wherein the spacer is arranged in the gap before the holder isfitted.
 14. The method as claimed in claim 11, wherein the fixing methodused for the filling element and component is a soldering method. 15.The method as claimed in claim 11, wherein the fixing method used forthe filling element and component is a welding method.
 16. The method asclaimed in claim 11, wherein the fixing method used for the fillingelement and component is a laser welding method.
 17. The method asclaimed in claim 11, wherein the fixing method used for the fillingelement and component is an electron beam welding method.
 18. The methodas claimed in claim 11, wherein two holders are used.
 19. The method asclaimed in claim 11, wherein the holder is M-shaped.
 20. The method asclaimed in claim 11, wherein a first end of the M shape of the holder isfixed to a first holding point on the component, the middle of the Mshape of the holder is fixed to a second holding point on the fillingelement, and a second end of the M shape of the holder is fixed to athird holding point on the component.